231 
Doubtful species. 
Plotosus macrocephalus C. V. 
Plotosus macrocephalus Cuvier & Valenciennes, Hist. Nat. Poissons, XV. 1840, 
p- 428. 
Plotosus macrocephalus Bleeker, Atl. Ichth, Il. 1862, p. 98 (after Valenciennes’ 
description and figure). 
ylhis species is obtained from Péron, who caught it at 
Timor, as we believe. It is easily distinguished by its large 
head, which is 3/, of the total length, and only '/, less wide 
than long, and '/, as high as long. The eyes are '/, of the 
length of the head, situated in the middle of the head, 21/, 
diameters apart, and directed nearly upward. The lips are very 
thick, furnished with many fleshy thick papils. — The nasal 
and external mandibulary barbels are less than half the length 
of the head; the maxillary and internal mandibulary barbels 
are still shorter, all thickened at their base. 
DGG Weel Ok. (tot. 202): 
These numbers are however not absolutely certain, as the 
end of the tail is mutilated. Our specimen is 18 pouces 
long. In spirits it is brownish grey above and lighter below.” 
(Translated from. Valenciennes). 
Giinther (Cat. Brit. Mus. v. 1864, p. 27, foot note) says that 
“this fish appears to be allied to Cuzdoglanis megastoma, but 
Valenciennes does not make mention of the peculiar gillopening 
which we observe in the latter species.” 
Macleay (Proc. Linn. Soc. N. S. Wales VII, 1883, p. 592) 
records Plotosus macrocephalus C. V. from New Guinea, but 
does not give any description. Only the native name , Deteira” 
is mentioned. 
Nothing else can be said about this species as the type 
specimen can not be found in the Paris Museum, as Dr. Pel- 
legrin is kind enough to inform us. 
3. Cnidoglanis Giinther. 
(GUNTHER. Cat. Brit. Mus. V. 1864, p. 27). 
Elongate, tail tapering, head depressed. Mouth transverse, 
rounded in front. Lips thick, with papillae. Upperlip promi- 
nent. Anterior nostril on the front border of the upperlip, 
